void glTexImage2D(  GLenum      target,
  

  GLint   level,
  

  GLint   internalFormat,
  

  GLsizei     width,
  

  GLsizei     height,
  

  GLint   border,
  

  GLenum      format,
  

  GLenum      type,
  

  const GLvoid *      data);
 

  glTexImage2D(GL_TEXTURE_2D,0,GL_LUMINANCE8,size,size,0,GL_LUMINANCE,GL_UNSIGNED_BYTE,buffer);